Top 5 Construction & Trades web developers in Cologne

In Cologne, a business website typically costs €5,000 – €20,000, while a custom web app runs €20,000 – €120,000. Agency day rates of EUR 75-150/hr are the main driver, followed by integrations and how much custom functionality you need. Tecklogist quotes construction & trades projects from from €799 at a fixed price.

A business website usually takes 3–6 weeks; a custom web app takes 8–20 weeks. Delays almost always come from late content, unclear scope or third-party integrations, so agree those before work starts.

The usual options are Custom WordPress, Next.js, Buildxact / Procore and Squarespace / Wix. The right one depends on how often your team edits content, which systems the site must connect to and your budget, so be wary of any Cologne agency that recommends the same platform for every client.

Ask about optimised project portfolio with before/after galleries and project-specific detail pages, not a single lightbox page titled 'Our Work'; mobile-first page speed above 80 on Lighthouse-construction photography is inherently high-resolution; ask how the agency handles image compression and lazy loading; quote request form that captures project type, rough budget range, and postcoded location-routes directly to the sales pipeline, not a generic email inbox. Then ask for two or three live construction & trades websites they built, who will actually work on yours, and what support looks like after launch.

This list is published by Tecklogist, and we rank ourselves first because construction & trades websites are core work for us: fixed prices, fixed timelines and code you own. The other Cologne agencies are ordered by the construction & trades evidence in their public profiles, and none of them pay to appear.